What is bonito flakes? The dancing fish on takoyaki and okonomiyaki
Bonito flakes are tiny curls of dried, fermented skipjack tuna, known in Japanese kitchens as katsuobushi. Brushed over a hot dish, they lift, quiver and settle in wavering movements, creating the “dancing fish” effect. The movement is only part of the experience: the flakes also release a concentrated marine aroma and layers of savoury depth as their aroma reaches the diner.
Put simply, katsuobushi is a finished pantry ingredient, not fresh tuna placed on rice. Whole fish are salted, dried, smoked and aged until the flesh becomes firm. Chefs shave the hardened loin with a traditional thin-bladed tool called a kezuriki, producing curls so thin they seem almost weightless. A small amount can give dashi a rounded umami character, while a larger shaving provides aroma, texture and visual movement.
For Australian cooks, availability depends on where they shop. Specialist Japanese grocers in Sydney’s Cabramatta and Eastwood suburbs, or around Victoria Street in Abbotsford, Melbourne, are good places to look for katsuobushi or bonito flakes. Mainstream supermarkets may stock instant dashi and soy sauce, but the shaved flakes are more likely in the international aisle. Local labels also use grams and Australian dollars, and Australian menus usually call a meal to go “takeaway”.
From skipjack to delicate shavings
The fish used for katsuobushi is generally skipjack tuna, scientifically known as Thunnus alalunga. “Bonito” can be used broadly in English, which sometimes causes confusion with other tuna and mackerel. The flakes are sold in several forms: light shavings from the outside of the block, darker curls from the centre, and powdered katsuobushi for stocks and seasoning. Their colour and strength change through processing, but all begin with the careful preservation of fish.
Texture is as important as flavour. Katsuobushi adds a feathery lightness beside plump fish, cucumber and rice, while ingredients such as dried gourd strips provide a chewy contrast in rolls. Fresh flakes keep their curl and float on soup; older or damp flakes become soft and sink. For the best movement, chefs often shave or garnish the flakes immediately before serving.
Why the fish appears to dance
Heat supplies the force behind the movement. A hot takoyaki ball or okonomiyaki transfers warmth into the thin curl, softening it slightly and releasing moisture and trapped air. Warm vapour and gentle convection lift the edges of each shaving. The curls twist, stand upright, then drift down again, so the topping seems alive without any added motion.
The effect is brief, often lasting only a few seconds. It depends on plate temperature, flake thickness and the amount of sauce or oil beneath them. A dry hot surface produces the strongest fluttering; a cool, wet or heavily sauced dish dampens the curls sooner. This is why theatre-minded chefs add the garnish at the pass or beside the table, allowing the guest to see the flakes move before they mingle with the sauce.
Those seconds also preserve the aroma. Heat carries volatile marine notes towards the nose while the curls remain visually distinct from the food. The result is a fragrant final layer, especially welcome beside rich mayonnaise, sweet soy, seaweed or the char of a griddled savoury pancake.
Flakes on takoyaki and okonomiyaki
Takoyaki uses the garnish particularly well. Each small batter cake is typically filled with tender octopus and cooked in a lightly seasoned mould, then topped with sauce, seaweed and bonito flakes. As the rounded cakes reach the table, the curls rise over their browned tops. One bite combines warm octopus, soft batter, savoury sauce and a feather-light fish aroma that fades quickly after the flakes touch the food.
Okonomiyaki offers a different canvas. This savoury cabbage pancake may arrive as a broad, griddled slice or a compact Osaka-style cake, with preferences for sauce, mayonnaise, seaweed and bonito flakes varying by kitchen and diner. Flakes add movement across the wide surface, but the larger portion allows them to be distributed more evenly. Some cooks place them underneath the sauces, while others wait until the pancake is cut so they remain visible.
Sushi Ya - Garden City reflects the variety found in a broad Japanese menu. Alongside sushi, sashimi, special rolls, hibachi, tempura, appetizers, entrees, desserts and lunch specials, there is room for both familiar Japanese comfort food and more creative presentations. That mix matters because bonito flakes work as a bridge: familiar to diners who know takoyaki, intriguing to those discovering it, and useful as a delicate aromatic accent across many dishes.
Pairing flakes with a Japanese meal
The most natural partners are savoury, mild and lightly sweet. Put bonito flakes over steamed rice, miso soup, cucumber salad or a bowl of noodles with a little soy-based broth. Their umami supports these restrained flavours rather than competing with them. Pickled ginger, wasabi and a crisp slaw provide contrast, while tempura adds a greasy crunch that softens the flakes as they are eaten.
They can also act as a bridge between hot and cool dishes on the same table. Warm takoyaki or okonomiyaki benefits from their lifting aroma, while sashimi and chilled noodles call for a smaller, drier scattering. Fish does not always need heat: a tuna-based salad can provide a cool counterpoint, and this layered savoury salad demonstrates how distinct layers keep each texture readable rather than hiding it beneath heavy dressing.
At a restaurant, ask whether the flakes are meant to be stirred through the dish or left on top. There is no single correct method. Leaving them intact preserves the aroma and movement, while mixing them into a hot sauce creates a deeper, more evenly distributed savoury note. Diners who prefer less fish aroma can fold them into the sauce rather than eating them separately.
Using bonito flakes in an Australian kitchen
A pinch goes a long way at home. Use katsuobushi on miso soup, steamed vegetables, rice bowls, grilled fish or a simple salad, adding it just before eating so the curls stay dry and lively. Home cooks can also use a katsuoegi, the fine box grater commonly paired with kombu, or buy pre-shaved flakes for takoyaki-style bites and okonomiyaki.
Store the flakes airtight in a cool, dark cupboard and take only what you need with dry hands or a clean spoon. Moisture is the enemy of both curl and aroma; a damp spoon can turn a whole container soft. Because bonito is fish, check the label for anyone avoiding seafood, and note that dashi may also contain bonito even when no visible flakes are present.
For creative home versions, try bonito flakes on a warm potato salad, mushrooms or a bowl of greens with sesame dressing. They contribute a savoury lift without requiring a complicated recipe. Start with a small amount, taste, and adjust according to how strongly the dried fish suits your palate and the other salty or smoky ingredients already in the dish.
Visit Sushi Ya - Garden City at 949 Franklin Ave, Garden City, New York, to explore Japanese dishes built around fresh ingredients, traditional flavours and creative specials. Dine in and experience the flutter of bonito flakes over a hot plate, order delivery for a relaxed meal at home, or choose takeout and add the garnish just before serving.
Order the lunch specials, share an appetiser with a special roll, and save room for dessert as the flakes carry their aroma from the first lift to the last savoury note.